Improvement in padlocks



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VLetters Patent N 97,127, datcd November 23. 1869.

IMPROVEMENT 1N PADLOCKS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I. THOMAS SLA1GHT,of Newark, in the county ot' Essex, and State of New Jersey, have invented a new and improved Padlock; and I do hereby declare .that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

This invention relates to a new and improved padlock, ot' that class which is provided with racktmnhlers, or slotted tulnblers, to 'retain the bow or shackle in a locked state and serveas a safeguard aga-inst what is commonly termed pickingfg7 The invention consists in a peculiar construction of a pivoted dog or bolt, and one or more tumblers, the dogor bolt and tumblcrs being arranged relatively with eachother, and the bow or shackle, that the parts comprising the working-mechanism of the lock. are reduced to the smallestpossible number, and a very economical, simple, eiiicient, and'self-locking padlock obtained.

In the accompanying sheet of drawings- Figure 1 is an internal view ot' my invention, shown lin a locked state.

To enable those skilled in the art to fully undei'-,

stand and construct my invention, I will proceed to describe it.

A represents the case ot the padlock;

B, the bow or shackle, which works on a pin or pivot, a, at one end; and l '1), the fixed arbor in the case, on which the key c is fitted and turned in unlocking,r the lock.

These pa-rts, being ot' ordinary construction, do not require a special description.

C represents a series ot tumblers, which are fitted and work on a ixed arbor, (I, within the case, each tumbler having a spring, c, attached, which springs have a tendencyto keep the outer endsf, ol' the tmnblers, against the in ner edge ofthe case 1.1 the latter serving as a stop for the same, at the point g.

Each 'tumbler is provided witha slot, a", and the slots ot' the several tumblers have diti'ciaant positions, so that they `will not coincide with cach other in position when the leek is in a. locked state.

D is a dog or bolt, which works freely on a ,fixed lpin, h, within the case A.

One portion, j, ot' the-dog or bolt, is considerably thicker than the other part, designated by l: k', the

portion L being pendent, and projecting down sutticiently f'ar for the bit ot' the key to act against, when turned, after it has passed and acted upon the tumblers C.

' The portion k has a stump, I, projecting from it at right angles with its face. These parts are clearly shown in tig. 3.

' The tumblers C project over the portion L ofthe dog` or bolt.

The operation is as follows:

Suppose the lock to be in a locked state, as shown in tig. 1, the stump l, in this case, will be out from all the slots a* in the tmnblers C, and against thead-A joining edges of the. latter.

The tumblers are held in position by their springs, and the hook i, ot' the dog or bolt, is retained in the eye of the bow or shackle B.

In order to unlock the lock, the tumbler-s (l require to be raised so that all ot their slots a* will be brought in line with each other. This is done by the key c, the bits ot' which are ot' tf'arying lengths, to correspond with the varying position ot'thc slots in the tumbler-s.

lVhen the key has been 4turned suiiicicntly to effect this, it then comes in contact with the pendent part 7:, ot' the dog or bolt, and actuates the latter so that it will be turned o`n `its pivot h, and the stump l,

thrown into the slot's'a", and the hook i, of the dog or bolt, thrown out from the eye of the bow or shackle, as shown in tig. 2.

In order to see clearly into the novelty of the construction and arrapgement ot the abm'e-described padlock, the followingr peculiarities must be observed:

First, that it is not a spring-lock; that is to say,

'the bow or shackle is not acted upon or thrown out from the case hya spring, but that it is self-locking, or

l'ockcd by simply pressingthe disengaged end of' thehere muy he nue o more, but :L plurality of the l: \t- The holt D, constructed with the hook i, pmjec-V ter will most generally he used. tions j 1.', stump Z, und pnl-t la', when used in connec- Fmu'th. the springs r, ei'the tumblers, are the only tion with lhe m'dimu'y shackle B, tumhleI-s C, und

ones used, heine; ull that :u'e required.y sp1-ing w, :ill heng constructed, au'i'ungeil, and operliwh-d i'm-lij-tumhlelts I do not claim, fur they :ne ated substantially is herein described. v

old und weil known; neither do I claim al. pivoted dug THOS. SLAIGH'E.

l du vlziim z isuew, and desire to secure by Letters A. R. HAIGHT, Putent- W. HAUFF. 

